A meticulous detective who investigates the robbery case. Initially tasked with arresting Liu, he later becomes a crucial ally, using his knowledge of physiology and acupuncture to help Liu and ultimately sacrificing himself to defeat the Master.
Xu operates within the legal system while the magistrate corruptly abuses his position.
Xu directly targets the Master's defenses using specialized techniques.
Xu initially investigates Liu as a suspect in the robbery killings.
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